Display screen



FIG. 1 is a front perspective view of a display screen showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of the remainder of the display screen is for environmental purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen, as shown and described. 